| /* |
| * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (IndentOutdentCommandINCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core/editing/commands/IndentOutdentCommand.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ElementTraversal.h" |
| #include "core/editing/EditingUtilities.h" |
| #include "core/editing/VisibleUnits.h" |
| #include "core/editing/commands/InsertListCommand.h" |
| #include "core/html/HTMLBRElement.h" |
| #include "core/html/HTMLElement.h" |
| #include "core/layout/LayoutObject.h" |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| // Returns true if |node| is UL, OL, or BLOCKQUOTE with "display:block". |
| // "Outdent" command considers <BLOCKQUOTE style="display:inline"> makes |
| // indentation. |
| static bool isHTMLListOrBlockquoteElement(const Node* node) |
| { |
| if (!node || !node->isHTMLElement()) |
| return false; |
| if (!node->layoutObject() || !node->layoutObject()->isLayoutBlock()) |
| return false; |
| const HTMLElement& element = toHTMLElement(*node); |
| // TODO(yosin): We should check OL/UL element has "list-style-type" CSS |
| // property to make sure they layout contents as list. |
| return isHTMLUListElement(element) || isHTMLOListElement(element) || element.hasTagName(blockquoteTag); |
| } |
| |
| IndentOutdentCommand::IndentOutdentCommand(Document& document, EIndentType typeOfAction) |
| : ApplyBlockElementCommand(document, blockquoteTag, "margin: 0 0 0 40px; border: none; padding: 0px;") |
| , m_typeOfAction(typeOfAction) |
| { |
| } |
| |
| bool IndentOutdentCommand::tryIndentingAsListItem(const Position& start, const Position& end, EditingState* editingState) |
| { |
| // If our selection is not inside a list, bail out. |
| Node* lastNodeInSelectedParagraph = start.anchorNode(); |
| HTMLElement* listElement = enclosingList(lastNodeInSelectedParagraph); |
| if (!listElement) |
| return false; |
| |
| // Find the block that we want to indent. If it's not a list item (e.g., a div inside a list item), we bail out. |
| Element* selectedListItem = enclosingBlock(lastNodeInSelectedParagraph); |
| |
| // FIXME: we need to deal with the case where there is no li (malformed HTML) |
| if (!isHTMLLIElement(selectedListItem)) |
| return false; |
| |
| // FIXME: previousElementSibling does not ignore non-rendered content like <span></span>. Should we? |
| Element* previousList = ElementTraversal::previousSibling(*selectedListItem); |
| Element* nextList = ElementTraversal::nextSibling(*selectedListItem); |
| |
| // We should calculate visible range in list item because inserting new |
| // list element will change visibility of list item, e.g. :first-child |
| // CSS selector. |
| HTMLElement* newList = toHTMLElement(document().createElement(listElement->tagQName(), CreatedByCloneNode)); |
| insertNodeBefore(newList, selectedListItem, editingState); |
| if (editingState->isAborted()) |
| return false; |
| |
| // We should clone all the children of the list item for indenting purposes. However, in case the current |
| // selection does not encompass all its children, we need to explicitally handle the same. The original |
| // list item too would require proper deletion in that case. |
| if (end.anchorNode() == selectedListItem || end.anchorNode()->isDescendantOf(selectedListItem->lastChild())) { |
| moveParagraphWithClones(createVisiblePosition(start), createVisiblePosition(end), newList, selectedListItem, editingState); |
| } else { |
| moveParagraphWithClones(createVisiblePosition(start), VisiblePosition::afterNode(selectedListItem->lastChild()), newList, selectedListItem, editingState); |
| if (editingState->isAborted()) |
| return false; |
| removeNode(selectedListItem, editingState); |
| } |
| if (editingState->isAborted()) |
| return false; |
| |
| if (canMergeLists(previousList, newList)) { |
| mergeIdenticalElements(previousList, newList, editingState); |
| if (editingState->isAborted()) |
| return false; |
| } |
| if (canMergeLists(newList, nextList)) { |
| mergeIdenticalElements(newList, nextList, editingState); |
| if (editingState->isAborted()) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, HTMLElement*& targetBlockquote, EditingState* editingState) |
| { |
| Element* enclosingCell = toElement(enclosingNodeOfType(start, &isTableCell)); |
| Element* elementToSplitTo; |
| if (enclosingCell) |
| elementToSplitTo = enclosingCell; |
| else if (enclosingList(start.computeContainerNode())) |
| elementToSplitTo = enclosingBlock(start.computeContainerNode()); |
| else |
| elementToSplitTo = rootEditableElementOf(start); |
| |
| if (!elementToSplitTo) |
| return; |
| |
| Node* outerBlock = (start.computeContainerNode() == elementToSplitTo) ? start.computeContainerNode() : splitTreeToNode(start.computeContainerNode(), elementToSplitTo); |
| |
| VisiblePosition startOfContents = createVisiblePosition(start); |
| if (!targetBlockquote) { |
| // Create a new blockquote and insert it as a child of the root editable element. We accomplish |
| // this by splitting all parents of the current paragraph up to that point. |
| targetBlockquote = createBlockElement(); |
| if (outerBlock == start.computeContainerNode()) { |
| // When we apply indent to an empty <blockquote>, we should call insertNodeAfter(). |
| // See http://crbug.com/625802 for more details. |
| if (outerBlock->hasTagName(blockquoteTag)) |
| insertNodeAfter(targetBlockquote, outerBlock, editingState); |
| else |
| insertNodeAt(targetBlockquote, start, editingState); |
| } else |
| insertNodeBefore(targetBlockquote, outerBlock, editingState); |
| if (editingState->isAborted()) |
| return; |
| startOfContents = VisiblePosition::inParentAfterNode(*targetBlockquote); |
| } |
| |
| VisiblePosition endOfContents = createVisiblePosition(end); |
| if (startOfContents.isNull() || endOfContents.isNull()) |
| return; |
| moveParagraphWithClones(startOfContents, endOfContents, targetBlockquote, outerBlock, editingState); |
| } |
| |
| void IndentOutdentCommand::outdentParagraph(EditingState* editingState) |
| { |
| VisiblePosition visibleStartOfParagraph = startOfParagraph(endingSelection().visibleStart()); |
| VisiblePosition visibleEndOfParagraph = endOfParagraph(visibleStartOfParagraph); |
| |
| HTMLElement* enclosingElement = toHTMLElement(enclosingNodeOfType(visibleStartOfParagraph.deepEquivalent(), &isHTMLListOrBlockquoteElement)); |
| if (!enclosingElement || !hasEditableStyle(*enclosingElement->parentNode())) // We can't outdent if there is no place to go! |
| return; |
| |
| // Use InsertListCommand to remove the selection from the list |
| if (isHTMLOListElement(*enclosingElement)) { |
| applyCommandToComposite(InsertListCommand::create(document(), InsertListCommand::OrderedList), editingState); |
| return; |
| } |
| if (isHTMLUListElement(*enclosingElement)) { |
| applyCommandToComposite(InsertListCommand::create(document(), InsertListCommand::UnorderedList), editingState); |
| return; |
| } |
| |
| // The selection is inside a blockquote i.e. enclosingNode is a blockquote |
| VisiblePosition positionInEnclosingBlock = VisiblePosition::firstPositionInNode(enclosingElement); |
| // If the blockquote is inline, the start of the enclosing block coincides with |
| // positionInEnclosingBlock. |
| VisiblePosition startOfEnclosingBlock = (enclosingElement->layoutObject() && enclosingElement->layoutObject()->isInline()) ? positionInEnclosingBlock : startOfBlock(positionInEnclosingBlock); |
| VisiblePosition lastPositionInEnclosingBlock = VisiblePosition::lastPositionInNode(enclosingElement); |
| VisiblePosition endOfEnclosingBlock = endOfBlock(lastPositionInEnclosingBlock); |
| if (visibleStartOfParagraph.deepEquivalent() == startOfEnclosingBlock.deepEquivalent() |
| && visibleEndOfParagraph.deepEquivalent() == endOfEnclosingBlock.deepEquivalent()) { |
| // The blockquote doesn't contain anything outside the paragraph, so it can be totally removed. |
| Node* splitPoint = enclosingElement->nextSibling(); |
| removeNodePreservingChildren(enclosingElement, editingState); |
| if (editingState->isAborted()) |
| return; |
| // outdentRegion() assumes it is operating on the first paragraph of an enclosing blockquote, but if there are multiply nested blockquotes and we've |
| // just removed one, then this assumption isn't true. By splitting the next containing blockquote after this node, we keep this assumption true |
| if (splitPoint) { |
| if (Element* splitPointParent = splitPoint->parentElement()) { |
| if (splitPointParent->hasTagName(blockquoteTag) |
| && !splitPoint->hasTagName(blockquoteTag) |
| && hasEditableStyle(*splitPointParent->parentNode())) // We can't outdent if there is no place to go! |
| splitElement(splitPointParent, splitPoint); |
| } |
| } |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| visibleStartOfParagraph = createVisiblePosition(visibleStartOfParagraph.deepEquivalent()); |
| visibleEndOfParagraph = createVisiblePosition(visibleEndOfParagraph.deepEquivalent()); |
| if (visibleStartOfParagraph.isNotNull() && !isStartOfParagraph(visibleStartOfParagraph)) { |
| insertNodeAt(HTMLBRElement::create(document()), visibleStartOfParagraph.deepEquivalent(), editingState); |
| if (editingState->isAborted()) |
| return; |
| } |
| if (visibleEndOfParagraph.isNotNull() && !isEndOfParagraph(visibleEndOfParagraph)) |
| insertNodeAt(HTMLBRElement::create(document()), visibleEndOfParagraph.deepEquivalent(), editingState); |
| return; |
| } |
| Node* splitBlockquoteNode = enclosingElement; |
| if (Element* enclosingBlockFlow = enclosingBlock(visibleStartOfParagraph.deepEquivalent().anchorNode())) { |
| if (enclosingBlockFlow != enclosingElement) { |
| splitBlockquoteNode = splitTreeToNode(enclosingBlockFlow, enclosingElement, true); |
| } else { |
| // We split the blockquote at where we start outdenting. |
| Node* highestInlineNode = highestEnclosingNodeOfType(visibleStartOfParagraph.deepEquivalent(), isInline, CannotCrossEditingBoundary, enclosingBlockFlow); |
| splitElement(enclosingElement, highestInlineNode ? highestInlineNode : visibleStartOfParagraph.deepEquivalent().anchorNode()); |
| } |
| } |
| VisiblePosition startOfParagraphToMove = startOfParagraph(visibleStartOfParagraph); |
| VisiblePosition endOfParagraphToMove = endOfParagraph(visibleEndOfParagraph); |
| if (startOfParagraphToMove.isNull() || endOfParagraphToMove.isNull()) |
| return; |
| HTMLBRElement* placeholder = HTMLBRElement::create(document()); |
| insertNodeBefore(placeholder, splitBlockquoteNode, editingState); |
| if (editingState->isAborted()) |
| return; |
| moveParagraph(startOfParagraphToMove, endOfParagraphToMove, VisiblePosition::beforeNode(placeholder), editingState, PreserveSelection); |
| } |
| |
| // FIXME: We should merge this function with ApplyBlockElementCommand::formatSelection |
| void IndentOutdentCommand::outdentRegion(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection, EditingState* editingState) |
| { |
| VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection); |
| VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection); |
| |
| if (endOfCurrentParagraph.deepEquivalent() == endOfLastParagraph.deepEquivalent()) { |
| outdentParagraph(editingState); |
| return; |
| } |
| |
| Position originalSelectionEnd = endingSelection().end(); |
| VisiblePosition endAfterSelection = endOfParagraph(nextPositionOf(endOfLastParagraph)); |
| |
| while (endOfCurrentParagraph.deepEquivalent() != endAfterSelection.deepEquivalent()) { |
| VisiblePosition endOfNextParagraph = endOfParagraph(nextPositionOf(endOfCurrentParagraph)); |
| if (endOfCurrentParagraph.deepEquivalent() == endOfLastParagraph.deepEquivalent()) |
| setEndingSelection(VisibleSelection(originalSelectionEnd, TextAffinity::Downstream)); |
| else |
| setEndingSelection(endOfCurrentParagraph); |
| |
| outdentParagraph(editingState); |
| if (editingState->isAborted()) |
| return; |
| |
| // outdentParagraph could move more than one paragraph if the paragraph |
| // is in a list item. As a result, endAfterSelection and endOfNextParagraph |
| // could refer to positions no longer in the document. |
| if (endAfterSelection.isNotNull() && !endAfterSelection.deepEquivalent().isConnected()) |
| break; |
| |
| if (endOfNextParagraph.isNotNull() && !endOfNextParagraph.deepEquivalent().isConnected()) { |
| endOfCurrentParagraph = createVisiblePosition(endingSelection().end()); |
| endOfNextParagraph = endOfParagraph(nextPositionOf(endOfCurrentParagraph)); |
| } |
| endOfCurrentParagraph = endOfNextParagraph; |
| } |
| } |
| |
| void IndentOutdentCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection, EditingState* editingState) |
| { |
| if (m_typeOfAction == Indent) |
| ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection, editingState); |
| else |
| outdentRegion(startOfSelection, endOfSelection, editingState); |
| } |
| |
| void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, HTMLElement*& blockquoteForNextIndent, EditingState* editingState) |
| { |
| bool indentingAsListItemResult = tryIndentingAsListItem(start, end, editingState); |
| if (editingState->isAborted()) |
| return; |
| if (indentingAsListItemResult) |
| blockquoteForNextIndent = nullptr; |
| else |
| indentIntoBlockquote(start, end, blockquoteForNextIndent, editingState); |
| } |
| |
| InputEvent::InputType IndentOutdentCommand::inputType() const |
| { |
| return m_typeOfAction == Indent ? InputEvent::InputType::Indent : InputEvent::InputType::Outdent; |
| } |
| |
| } // namespace blink |